<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        p {
            /*下划线*/
            text-decoration: underline;
        }

        div {
            /*穿肠线*/
            text-decoration: line-through;
        }

        h2 {
            /*上划线*/
            text-decoration: overline;
        }

        a {
            /*去除超链接中的下划线*/
            text-decoration: none;
        }
    </style>
</head>
<body>
<p>pppp加上下划线</p>
<div>div穿肠线</div>
<h2>h2上划线</h2>
<a href="#">这是一个超链接, 去除下划线</a>
</body>
</html>